. >> woodruff: a charge his n running mate paul ryan continu later in colorado. >> he's got a new idea for the >> you know, we already have a secretary of business. it's actually called the secretary of commerce. that's what this... that's what this agency does. >> woodruff: meanwhile, vice inresident joe biden spent the day in iowa, where he attacked ryan's budget plan. >> look, ryan saying that his budget doesn't cut-- it just slows-- is a little like romney standing in an unemployment line and saying to the unemployed guy, look, i want to make it clear to you: i didn't outsource your job; i just offshored your job. >> woodruff: in fact, today the candidates, their running mates, spouses and surrogates blanketed seven toss-up states around the country. former president bill clinton has hit the trail hard, appearing today in wisconsin and ohio on behalf of the president. >> but i am far more enthusiastic four years ago. >> woodruff: clinton was in minesota earlier in the week, where the romney campaign recently announced a new ad buy. it's a place both sides had earlier assumed would